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            ubuntu 20 安装 多版本 Python | 举个栗子
        
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    <p>Ubuntu20 安装多个版本Python </p>
<a id="more"></a>

<h2 id="下载"><a href="#下载" class="headerlink" title="下载"></a>下载</h2><p>GitHub 下载</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="built_in">clone</span> https://github.com/pyenv/pyenv.git ~/.pyenv</span><br></pre></td></tr></table></figure>

<p>码云下载加速</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="built_in">clone</span> https://github.com/aifenxiang/pyenv.git ~/.pyenv</span><br></pre></td></tr></table></figure>

<h2 id="配置"><a href="#配置" class="headerlink" title="配置"></a>配置</h2><p>bash 配置</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">echo</span> <span class="string">&#x27;export PYENV_ROOT=&quot;$HOME/.pyenv&quot;&#x27;</span> &gt;&gt; ~/.bash_profile</span><br><span class="line"><span class="built_in">echo</span> <span class="string">&#x27;export PATH=&quot;$PYENV_ROOT/bin:$PATH&quot;&#x27;</span> &gt;&gt; ~/.bash_profile</span><br><span class="line"><span class="built_in">echo</span> -e <span class="string">&#x27;if command -v pyenv 1&gt;/dev/null 2&gt;&amp;1; then\n  eval &quot;$(pyenv init -)&quot;\nfi&#x27;</span> &gt;&gt; ~/.bash_profile</span><br><span class="line"><span class="built_in">source</span> ~/.bash_profile</span><br></pre></td></tr></table></figure>

<p>zsh 配置</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">echo</span> <span class="string">&#x27;export PYENV_ROOT=&quot;$HOME/.pyenv&quot;&#x27;</span> &gt;&gt; ~/.zshrc</span><br><span class="line"><span class="built_in">echo</span> <span class="string">&#x27;export PATH=&quot;$PYENV_ROOT/bin:$PATH&quot;&#x27;</span> &gt;&gt; ~/.zshrc</span><br><span class="line"><span class="built_in">echo</span> -e <span class="string">&#x27;if command -v pyenv 1&gt;/dev/null 2&gt;&amp;1; then\n  eval &quot;$(pyenv init -)&quot;\nfi&#x27;</span> &gt;&gt; ~/.zshrc</span><br><span class="line"><span class="built_in">source</span> ~/.zshrc</span><br></pre></td></tr></table></figure>

<p>bash 还是 zsh 根据用户 SHELL 配置其一即可</p>
<h2 id="安装-Python"><a href="#安装-Python" class="headerlink" title="安装 Python"></a>安装 Python</h2><h3 id="安装依赖"><a href="#安装依赖" class="headerlink" title="安装依赖"></a>安装依赖</h3><p>Ubuntu</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo apt-get update; sudo apt-get install --no-install-recommends make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev</span><br></pre></td></tr></table></figure>

<p><a target="_blank" rel="noopener" href="https://github.com/pyenv/pyenv/wiki#suggested-build-environment">其它发行版依赖</a></p>
<h3 id="安装-Python-1"><a href="#安装-Python-1" class="headerlink" title="安装 Python"></a>安装 Python</h3><p>查看可安装的版本</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pyenv list</span><br></pre></td></tr></table></figure>

<p>安装 Python</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pyenv install 3.7.7</span><br></pre></td></tr></table></figure>

<p>设置默认 Python 版本</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pyenv global 3.7.7</span><br></pre></td></tr></table></figure>

<h3 id="下载慢或者下载出错"><a href="#下载慢或者下载出错" class="headerlink" title="下载慢或者下载出错"></a>下载慢或者下载出错</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">Downloading Python-3.7.7.tar.xz...</span><br><span class="line">-&gt; https:&#x2F;&#x2F;www.python.org&#x2F;ftp&#x2F;python&#x2F;3.7.7&#x2F;Python-3.7.7.tar.xz</span><br><span class="line">error: failed to download Python-3.7.7.tar.xz</span><br><span class="line"></span><br><span class="line">BUILD FAILED (Ubuntu 20.04 using python-build 1.2.19-6-gbdfed51d)</span><br></pre></td></tr></table></figure>

<ol>
<li>手动复制下载地址, 使用 <a target="_blank" rel="noopener" href="https://github.com/subhra74/xdm/releases">xdm</a> 下载， 如： <code>https://www.python.org/ftp/python/3.7.7/Python-3.7.7.tar.xz</code></li>
<li>将下载的文件复制到 <code>~/.pyenv/cache</code> 目录； 如果 <code>cache</code> 目录不存在， 手动创建即可</li>
<li>重新执行安装命令： <code>pyenv install 3.7.7</code></li>
</ol>

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        <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%8B%E8%BD%BD"><span class="toc-number">1.</span> <span class="toc-text">下载</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E9%85%8D%E7%BD%AE"><span class="toc-number">2.</span> <span class="toc-text">配置</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%AE%89%E8%A3%85-Python"><span class="toc-number">3.</span> <span class="toc-text">安装 Python</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%AE%89%E8%A3%85%E4%BE%9D%E8%B5%96"><span class="toc-number">3.1.</span> <span class="toc-text">安装依赖</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%AE%89%E8%A3%85-Python-1"><span class="toc-number">3.2.</span> <span class="toc-text">安装 Python</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E4%B8%8B%E8%BD%BD%E6%85%A2%E6%88%96%E8%80%85%E4%B8%8B%E8%BD%BD%E5%87%BA%E9%94%99"><span class="toc-number">3.3.</span> <span class="toc-text">下载慢或者下载出错</span></a></li></ol></li></ol>
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